US9717548B2 - Electrode for use in a bipolar electrosurgical instrument - Google Patents

Electrode for use in a bipolar electrosurgical instrument Download PDF

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US9717548B2
US9717548B2 US14/295,049 US201414295049A US9717548B2 US 9717548 B2 US9717548 B2 US 9717548B2 US 201414295049 A US201414295049 A US 201414295049A US 9717548 B2 US9717548 B2 US 9717548B2
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electrically
housing
jaw
dissector
tissue
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US20150088128A1 (en
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Gary M. Couture
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Covidien LP
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Covidien LP
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Assigned to COVIDIEN LP reassignment COVIDIEN LP ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COUTURE, GARY M.
Priority to EP18191608.1A priority patent/EP3434216B1/fr
Priority to PCT/US2014/052212 priority patent/WO2015047611A1/fr
Priority to CN201480052501.2A priority patent/CN105578980B/zh
Priority to EP14848376.1A priority patent/EP3049006B1/fr
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00589—Coagulation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00601—Cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00607—Coagulation and cutting with the same instrument
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A61B2018/1452—Probes having pivoting end effectors, e.g. forceps including means for cutting

Definitions

  • the present disclosure relates to electrosurgical instruments. More particularly, the present disclosure relates to a bipolar electrosurgical instrument, such as, for example, a vessel-sealing device, including a jaw assembly that includes an electrode adapted for tissue dissection and coagulation.
  • a bipolar electrosurgical instrument such as, for example, a vessel-sealing device, including a jaw assembly that includes an electrode adapted for tissue dissection and coagulation.
  • Electrosurgical instruments have become widely used by surgeons. Electrosurgery involves the application of electrical energy and/or electromagnetic energy to cut, dissect, ablate, coagulate, cauterize, seal or otherwise treat biological tissue during a surgical procedure. Electrosurgery is typically performed using an electrosurgical generator operable to output energy and a handpiece including a surgical instrument (e.g., end effector) adapted to transmit energy to a tissue site during electrosurgical procedures. Electrosurgery can be performed using either a monopolar or a bipolar instrument.
  • both monopolar and bipolar electrosurgery use an instrument with a single, active electrode to deliver energy from an electrosurgical generator to tissue.
  • a patient return electrode also called a grounding pad, bovie pad, neutral electrode or patient plate, is attached externally to the patient (e.g., a plate positioned on the patient's thigh or back) as the means to complete the electrical circuit between the electrosurgical generator and the patient.
  • the electrosurgical energy is applied, the energy travels from the active electrode, to the surgical site, through the patient and to the return electrode.
  • bipolar electrosurgery both the active electrode and return electrode functions are performed at the site of surgery.
  • Bipolar electrosurgical devices include two electrodes of opposite polarity that are located in proximity to one another for the application of current between their surfaces. Bipolar electrosurgical current travels from one electrode, through the intervening tissue to the other electrode to complete the electrical circuit, thereby eliminating the need for a remotely-located current return.
  • Bipolar instruments generally include end-effectors, such as grippers, cutters, forceps, dissectors and the like.
  • Bipolar electrosurgical forceps utilize mechanical action to constrict, grasp, dissect and/or clamp tissue.
  • a surgeon can utilize both mechanical clamping action and electrosurgical energy to effect hemostasis by heating the tissue and blood vessels to cauterize, coagulate/desiccate, seal and/or divide tissue.
  • Bipolar electrosurgical forceps utilize two generally opposing electrodes that are operably associated with the inner opposing surfaces of an end effector and that are both electrically coupled to an electrosurgical generator.
  • the end-effector assembly In bipolar forceps, the end-effector assembly generally includes opposing jaw assemblies pivotably mounted with respect to one another. In bipolar configuration, only the tissue grasped between the jaw assemblies is included in the electrical circuit.
  • a surgeon can cauterize, coagulate/desiccate and/or seal tissue and/or simply reduce or slow bleeding by controlling the intensity, frequency and duration of the electrosurgical energy applied through the jaw assemblies to the tissue.
  • mechanical factors such as the pressure applied between opposing jaw assemblies and the gap distance between the electrically-conductive tissue-contacting surfaces (electrodes) of the jaw assemblies play a role in determining the resulting thickness of the sealed tissue and effectiveness of the seal.
  • a variety of types of end-effector assemblies have been employed for various types of electrosurgery using a variety of types of monopolar and bipolar electrosurgical instruments.
  • an end-effector assembly includes opposing first and second jaw assemblies, at least one of the first and second assemblies is movable relative to the other from a first position wherein the jaw assemblies are disposed in spaced relation relative to one another to at least a second position closer to one another wherein the jaw assemblies cooperate to grasp tissue therebetween.
  • the first jaw assembly includes a first housing and a first electrically-conductive tissue-engaging structure associated with at least a portion of the first housing.
  • the second jaw assembly includes a second housing and a second electrically-conductive tissue-engaging structure associated with at least a portion of the second housing.
  • the end-effector assembly also includes a dissector electrode coupled along at least a portion of a lateral side portion of either one of the first housing or the second housing.
  • the dissector electrode is electrically-isolated from the first and second electrically-conductive tissue-engaging structures.
  • a bipolar forceps includes a housing having a shaft affixed thereto.
  • the shaft includes opposing jaw assemblies attached to a distal end thereof. At least one of jaw assemblies is movable relative to the other from a first position wherein the jaw assemblies are disposed in spaced relation relative to one another to at least a second position closer to one another wherein the jaw assemblies cooperate to grasp tissue therebetween.
  • Each jaw assembly includes an outer housing and an electrically-conductive tissue-engaging structure associated with at least a portion of the outer housing.
  • the bipolar forceps also includes one or more dissector electrodes coupled along at least a portion of a lateral side portion of either one of housings. The one or more dissector electrodes are electrically-isolated from the electrically-conductive tissue-engaging structures. A current return path during activation of the at least one dissector electrode includes either one of the electrically-conductive tissue-engaging structures.
  • a bipolar forceps includes a housing having a shaft affixed thereto.
  • the shaft includes first and second jaw assemblies attached to a distal end thereof. At least one of the first and second jaw assemblies is movable relative to the other from a first position wherein the jaw assemblies are disposed in spaced relation relative to one another to at least a second position closer to one another wherein the jaw assemblies cooperate to grasp tissue therebetween.
  • the first jaw assembly includes a first outer housing and a first electrically-conductive tissue-engaging structure disposed in association with at least a portion of the first outer housing.
  • the second jaw assembly includes a second outer housing and a second electrically-conductive tissue-engaging structure disposed in association with at least a portion of the second outer housing.
  • the bipolar forceps also includes first and second dissector electrodes.
  • the first dissector electrode is coupled along at least a portion of a first lateral side of the first outer housing, wherein the first dissector electrode is electrically-isolated from the first electrically-conductive tissue-engaging structure.
  • the second dissector electrode is coupled along at least a portion of a second lateral side of the second outer housing, wherein the second dissector electrode is electrically-isolated from the second electrically-conductive tissue-engaging structure.
  • the bipolar forceps is adapted to allow each one of the first and second dissector electrodes to be individually activated.
  • FIG. 1 is a right, side view of an endoscopic bipolar forceps showing a housing, a rotatable member, a shaft and an end-effector assembly in accordance with an embodiment of the present disclosure
  • FIG. 2 is a perspective view of an open bipolar forceps according to an embodiment of the present disclosure
  • FIG. 3 is a perspective view of the jaw assembly of the end-effector assembly of the bipolar forceps of FIG. 1 shown with an electrode adapted for tissue dissection and coagulation in accordance with an embodiment of the present disclosure
  • FIG. 4 is an enlarged, end view of another embodiment of a jaw assembly, similar to the jaw assembly of FIG. 3 , shown with an electrode adapted for tissue dissection and coagulation in accordance with the present disclosure;
  • FIG. 5 is a left, side view of the jaw assembly shown in FIG. 4 ;
  • FIG. 6 is an enlarged, end view of still another embodiment of a jaw assembly including an electrode adapted for tissue dissection and coagulation in accordance with the present disclosure
  • FIG. 7 is a left, side view of the jaw assembly shown in FIG. 6 ;
  • FIG. 8 is an enlarged, end view of a jaw assembly including two electrodes adapted for tissue dissection and coagulation in accordance with an embodiment of the present disclosure.
  • FIG. 9 is an enlarged, end view of another embodiment of a jaw assembly including two electrodes adapted for tissue dissection and coagulation in accordance with the present disclosure.
  • proximal refers to that portion of the apparatus, or component thereof, closer to the user and the term “distal” refers to that portion of the apparatus, or component thereof, farther from the user.
  • Various embodiments of the present disclosure provide electrosurgical instruments suitable for sealing, cauterizing, coagulating/desiccating, cutting and/or dissecting vessels and vascular tissue.
  • Various embodiments of the present disclosure provide an electrosurgical forceps with an end-effector assembly including two jaw assemblies disposed in opposing relation relative to one another.
  • Various embodiments of the presently-disclosed jaw assemblies include one or more dissector electrodes adapted for tissue dissection and coagulation.
  • Embodiments of the presently-disclosed end-effector assemblies may include jaw assemblies arranged in a unilateral or bilateral configuration.
  • Embodiments of the presently-disclosed electrosurgical forceps including a dissector electrode may be suitable for utilization in endoscopic surgical procedures and/or suitable for utilization in open surgical applications.
  • Embodiments of the presently-disclosed electrosurgical instruments may be connected through a suitable bipolar cable to a generator and/or other suitable power source.
  • the various embodiments disclosed herein may also be configured to work with robotic surgical systems and what is commonly referred to as “Telesurgery.”
  • Such systems employ various robotic elements to assist the surgeon in the operating theater and allow remote operation (or partial remote operation) of surgical instrumentation.
  • Various robotic arms, gears, cams, pulleys, electric and mechanical motors, etc. may be employed for this purpose and may be designed with a robotic surgical system to assist the surgeon during the course of an operation or treatment.
  • Such robotic systems may include remotely steerable systems, automatically flexible surgical systems, remotely flexible surgical systems, remotely articulating surgical systems, wireless surgical systems, modular or selectively configurable remotely operated surgical systems, etc.
  • the robotic surgical systems may be employed with one or more consoles that are next to the operating theater or located in a remote location.
  • one team of surgeons or nurses may prep the patient for surgery and configure the robotic surgical system with one or more of the instruments disclosed herein while another surgeon (or group of surgeons) remotely control the instruments via the robotic surgical system.
  • a highly skilled surgeon may perform multiple operations in multiple locations without leaving his/her remote console which can be both economically advantageous and a benefit to the patient or a series of patients.
  • the robotic arms of the surgical system are typically coupled to a pair of master handles by a controller.
  • the handles can be moved by the surgeon to produce a corresponding movement of the working ends of any type of surgical instrument (e.g., end effectors, graspers, knifes, scissors, etc.) which may complement the use of one or more of the embodiments described herein.
  • the movement of the master handles may be scaled so that the working ends have a corresponding movement that is different, smaller or larger, than the movement performed by the operating hands of the surgeon.
  • the scale factor or gearing ratio may be adjustable so that the operator can control the resolution of the working ends of the surgical instrument(s).
  • the master handles may include various sensors to provide feedback to the surgeon relating to various tissue parameters or conditions, e.g., tissue resistance due to manipulation, cutting or otherwise treating, pressure by the instrument onto the tissue, tissue temperature, tissue impedance, etc. As can be appreciated, such sensors provide the surgeon with enhanced tactile feedback simulating actual operating conditions.
  • the master handles may also include a variety of different actuators for delicate tissue manipulation or treatment further enhancing the surgeon's ability to mimic actual operating conditions.
  • an embodiment of an endoscopic bipolar forceps 10 is shown for use with various surgical procedures and generally includes a housing 20 , a handle assembly 30 , a rotatable assembly 80 , a trigger assembly 70 , and an end-effector assembly 100 .
  • End-effector assembly 100 generally includes two jaw assemblies 110 and 120 disposed in opposing relation relative to one another.
  • An embodiment of the end-effector assembly 100 in accordance with the present disclosure, is shown in more detail in FIG. 3 . It is to be understood, however, that other end-effector embodiments may also be used.
  • One or more components of the bipolar forceps 10 may be adapted to mutually cooperate to grasp, seal and/or divide tissue, e.g., tubular vessels and vascular tissue (not shown).
  • Forceps 10 may include additional, fewer, or different components than shown in FIG. 1 , depending upon a particular purpose or to achieve a desired result.
  • End-effector assembly 100 includes a dissector electrode 160 adapted for tissue dissection and coagulation.
  • Dissector electrode 160 which is described in more detail later in this description, may include any suitable electrically-conductive material, including, without limitation, metals, metal alloys, electrically-conductive polymers, and composite materials.
  • Dissector electrode 160 may be formed as a multi-layer configuration of materials.
  • one or more portions of the dissector electrode 160 may include an non-electrically-conductive or substantially non-electrically-conductive material configured to provide for electrical isolation between electrically-conductive elements of the dissector electrode 160 (e.g., tip portion 169 and/or shoulder portion 168 ) and one or more jaw assembly components, e.g., to reduce the chances of short circuiting the jaw assemblies 110 and 120 during activation, and/or to facilitate assembly and/or to meet specific tolerance requirements for proper jaw alignment, thermal resistance, strength and rigidity, which play a role in determining the reliability and effectiveness of electrosurgical instruments.
  • an inner-facing surface(s) thereof may include an non-electrically-conductive or substantially non-electrically-conductive material configured to provide for electrical isolation between electrically-conductive elements of the dissector electrode 160 (e.g., tip portion 169 and/or shoulder portion 168 ) and one or more jaw assembly components, e.g., to reduce the chances of short circuiting the jaw assemblies 110 and 120 during activation, and/or to facilitate assembly and/or
  • the end-effector assembly 100 includes jaw assemblies 110 and 120 in a unilateral configuration and the dissector electrode 160 is disposed in association with the movable jaw assembly 110 .
  • a dissector electrode adapted for tissue dissection and coagulation e.g., dissector electrode 660 shown in FIGS. 6 and 7
  • the fixed jaw assembly e.g., 620 shown in FIGS. 6 and 7
  • a dissector electrode in accordance with the present disclosure may be disposed in association either one of the bilateral jaw assemblies.
  • FIG. 1 depicts a bipolar forceps 10 for use in connection with endoscopic surgical procedures
  • teachings of the present disclosure may also apply to more traditional open surgical procedures.
  • the forceps 10 is described in terms of an endoscopic instrument; however, an open version of the forceps (e.g., bipolar forceps 200 shown in FIG. 2 ) may also include the same or similar operating components and features as described below.
  • Forceps 10 includes a shaft 12 having a distal end 14 configured to mechanically engage the end-effector assembly 100 and a proximal end 16 configured to mechanically engage the housing 20 .
  • the shaft 12 has a length from the proximal side of the handle assembly 30 to the distal side of the forceps 10 in a range of about 7 centimeters to about 44 centimeters.
  • End-effector assembly 100 may be selectively and releaseably engageable with the distal end 14 of the shaft 12
  • the proximal end 16 of the shaft 12 may be selectively and releaseably engageable with the housing 20 and the handle assembly 30 .
  • the proximal end 16 of the shaft 12 is received within the housing 20 , and connections relating thereto are disclosed in commonly assigned U.S. Pat. No. 7,150,097 entitled “METHOD OF MANUFACTURING JAW ASSEMBLY FOR VESSEL SEALER AND DIVIDER,” commonly assigned U.S. Pat. No. 7,156,846 entitled “VESSEL SEALER AND DIVIDER FOR USE WITH SMALL TROCARS AND CANNULAS,” commonly assigned U.S. Pat. No. 7,597,693 entitled “VESSEL SEALER AND DIVIDER FOR USE WITH SMALL TROCARS AND CANNULAS” and commonly assigned U.S. Pat. No. 7,771,425 entitled “VESSEL SEALER AND DIVIDER HAVING A VARIABLE JAW CLAMPING MECHANISM.”
  • forceps 10 includes an electrosurgical cable 15 .
  • Electrosurgical cable 15 may be formed from a suitable flexible, semi-rigid or rigid cable, and may connect directly to an electrosurgical power generating source 28 .
  • the electrosurgical cable 15 connects the forceps 10 to a connector 17 , which further operably connects the instrument 10 to the electrosurgical power generating source 28 .
  • Cable 15 may be internally divided into one or more cable leads each of which transmits energy through their respective feed paths to the end-effector assembly 100 .
  • Electrosurgical power generating source 28 may be any generator suitable for use with electrosurgical devices, and may be configured to provide various frequencies of electromagnetic energy. Examples of electrosurgical generators that may be suitable for use as a source of electrosurgical energy are commercially available under the trademarks FORCE EZTM, FORCE FXTM, and FORCE TRIADTM sold by Covidien Surgical Solutions of Boulder, Colo. Forceps 10 may alternatively be configured as a battery-powered wireless instrument.
  • End-effector assembly 100 may be configured as a unilateral assembly, i.e., the end-effector assembly 100 may include a stationary or fixed jaw assembly, e.g., 120 , mounted in fixed relation to the shaft 12 , and a moveable jaw assembly, e.g., 110 , mounted about a pivot pin 103 coupled to the fixed jaw assembly.
  • the forceps 10 may include a bilateral assembly, i.e., both jaw assemblies 110 and 120 are moveable relative to one another. Jaw assemblies 110 and 120 may be curved at various angles to facilitate manipulation of tissue and/or to provide enhanced line-of-sight for accessing targeted tissues.
  • Rotatable assembly 80 generally includes two halves (not shown), which, when assembled about a tube of shaft 12 , form a generally circular rotatable member 82 .
  • Rotatable assembly 80 may be configured to house a drive assembly (not shown) and/or a knife assembly (not shown), or components thereof.
  • a reciprocating sleeve (not shown) is slidingly disposed within the shaft 12 and remotely operable by the drive assembly (not shown).
  • Handle assembly 30 includes a fixed handle 50 and a movable handle 40 .
  • the fixed handle 50 is integrally associated with the housing 20
  • the movable handle 40 is selectively movable relative to the fixed handle 50 .
  • Movable handle 40 of the handle assembly 30 is ultimately connected to the drive assembly (not shown).
  • applying force to move the movable handle 40 toward the fixed handle 50 pulls the drive sleeve (not shown) proximally to impart movement to the jaw assemblies 110 and 120 from an open position, wherein the jaw assemblies 110 and 120 are disposed in spaced relation relative to one another, to a clamping or closed position, wherein the jaw assemblies 110 and 120 cooperate to grasp tissue therebetween.
  • Examples of handle assembly embodiments of the forceps 10 are described in the above-mentioned, commonly-assigned U.S. Pat. Nos. 7,150,097, 7,156,846, 7,597,693 and 7,771,425.
  • Forceps 10 includes a switch 90 configured to permit the user to selectively activate the forceps 10 in a variety of different orientations, i.e., multi-oriented activation. As can be appreciated, this simplifies activation.
  • the switch 90 When the switch 90 is depressed, electrosurgical energy is transferred through one or more electrical leads (not shown) to the jaw assemblies 110 and 120 .
  • FIG. 1 depicts the switch 90 disposed at the proximal end of the housing assembly 20
  • switch 200 may be disposed on another part of the forceps 10 (e.g., the fixed handle 50 , rotatable member 82 , etc.) or another location on the housing assembly 20 .
  • Jaw assemblies 110 and 120 include an electrically-conductive tissue-engaging surface or sealing plate 112 and 122 , respectively, arranged in opposed relation relative to one another and disposed in association with an outer housing 111 and 121 , respectively ( FIG. 3 ).
  • the outer housings 111 and 121 define a cavity therein configured to at least partially encapsulate and/or securely engage the sealing plates 112 and 122 , respectively, and/or other jaw assembly components.
  • the outer housings 111 and 121 may be formed, at least in part, of an non-electrically-conductive or substantially non-electrically-conductive material. Outer housing 111 and/or the outer housing 121 include one or more electrically-conductive portions suitably disposed relative to the dissector electrode 160 to provide a current return path. In some embodiments, as shown in FIG. 3 , the outer housing 111 includes two electrically-conductive portions 114 and 115 configured to provide a current return path. The shape, size, and relative location of the electrically-conductive portions 114 and 115 , e.g., in relation to the dissector electrode 160 , may be varied from the configuration depicted in FIG. 3 . Additionally, or alternatively, the outer housing 121 may include one or more electrically-conductive portions suitably disposed to provide a current return path.
  • Dissector electrode 160 includes a tip portion 169 and a shoulder portion 168 .
  • the tip portion 169 may extend distally beyond the distal end 113 of the outer housing 111 .
  • Tip portion 169 may be configured to provide a desired function, and may include curves at various angles to facilitate contact with targeted tissue.
  • the tip portion 169 is configured for dissection, and may include a sharp knife edge, a blunt tip, a blunt edge, paddle, hook, a ball-shaped portion, or another shape.
  • Shoulder portion 168 extends along at least a portion of a lateral side portion of the outer housing 111 .
  • the shoulder portion 168 is configured for coagulation. The shape and size of the shoulder portion 168 may be varied from the configuration depicted in FIGS. 1 and 3 , e.g., depending upon a particular purpose.
  • Sealing plates 112 and 122 may be adapted to connect to an electrosurgical energy source (e.g., 28 shown in FIG. 1 ) independently of one another such that either or both of the sealing plates 112 and 122 may be selectively energized, depending on a particular purpose.
  • the jaw assembly 110 is connected to a first electrical lead (not shown) and the jaw assembly 120 is connected to a second electrical lead (not shown), which, in turn, are electrically coupled with an electrosurgical energy source (e.g., 28 shown in FIG. 1 ).
  • the first and second electrical leads terminate within the outer housings 111 and 121 , respectively, e.g., electro-mechanically coupled to the sealing plates 112 and 122 , respectively, and may allow a user to selectively supply either bipolar or monopolar electrosurgical energy to the jaw assemblies 110 and 120 as needed during surgery.
  • Activation switch 90 ( FIG. 1 ) is selectively actuatable to control the supply of energy to the sealing plates 112 and 122 .
  • Activation switch 90 may include one or more switch components to facilitate selective activation of either or both of the sealing plates 112 and 122 .
  • One or both of the jaw assemblies 110 and 120 include a longitudinally-oriented slot or knife channel configured to permit reciprocation of a knife blade (not shown).
  • the knife channel 125 may be completely disposed in one of the two jaw assemblies, e.g., jaw assembly 120 , depending upon a particular purpose.
  • sealing plate 112 , 122 , outer housing 111 , 121 , and knife blade embodiments are disclosed in commonly assigned International Application Serial No. PCT/US01/11412 filed on Apr. 6, 2001, entitled “ELECTROSURGICAL INSTRUMENT WHICH REDUCES COLLATERAL DAMAGE TO ADJACENT TISSUE,” and commonly assigned International Application Serial No. PCT/US01/11411 filed on Apr. 6, 2001, entitled “ELECTROSURGICAL INSTRUMENT REDUCING FLASHOVER.”
  • an embodiment of an open forceps 200 is shown for use with various surgical procedures and generally includes an end effector assembly 230 operably associated with a pair of opposing shafts 212 a and 212 b and disposed in association with the distal ends 216 a and 216 b thereof, respectively.
  • End effector assembly 230 includes a first jaw member 232 and a second jaw member 234 disposed in opposing relation relative to one another and pivotably connected about a pivot pin 245 and movable relative to one another to grasp tissue.
  • Shaft 212 a includes a handle 215 disposed in association with the proximal end 214 a thereof.
  • Shaft 212 b includes a handle 217 disposed in association with the proximal end 214 b thereof.
  • Handles 215 and 217 define a finger and/or thumb hole 215 a and 217 a , respectively, therethrough for receiving the user's finger or thumb.
  • Finger and/or thumb holes 215 a and 217 a facilitate movement of the shafts 212 a and 212 b relative to one another to pivot the first and second jaw members 232 and 234 from an open position, wherein the first and second jaw members 232 and 234 are disposed in spaced relation relative to one another, to a clamping or closed position, wherein the first and second jaw members 232 and 234 cooperate to grasp tissue therebetween.
  • End-effector assembly 230 includes a dissector electrode 260 adapted for tissue dissection and coagulation.
  • Dissector electrode 260 includes a shoulder portion 268 .
  • the shape and size of the shoulder portion 268 may be varied from the configuration depicted in FIG. 2 , e.g., depending upon a particular purpose.
  • Dissector electrode 260 may include a tip portion 269 .
  • the dissector electrode 260 is disposed in association with the first jaw member 232 . In alternative embodiments, the dissector electrode 260 may be disposed in association with the second jaw member 234 . Dissector electrode 260 include any suitable electrically-conductive material, and may be formed as a multi-layer configuration of materials. In some embodiments, one or more portions of the dissector electrode 260 may include an non-electrically-conductive or substantially non-electrically-conductive material. Dissector electrode 260 shown in FIG. 2 is similar to the dissector electrode 160 shown in FIGS. 1 and 3 , and further description of the like elements is omitted in the interests of brevity.
  • FIGS. 4 and 5 show an end-effector assembly 400 in accordance with an embodiment of the present disclosure that includes a dissector electrode 460 adapted for tissue dissection and coagulation.
  • Dissector electrode 460 includes a tip portion 469 and a shoulder portion 468 as best shown in FIG. 5 .
  • End-effector assembly 400 generally includes two jaw assemblies 410 and 420 disposed in opposing relation relative to one another.
  • Jaw assemblies 410 and 420 each include an electrically-conductive tissue-engaging surface or sealing plate 412 and 422 , respectively, arranged in opposed relation relative to one another and disposed in association with an outer housing 411 and 421 , respectively.
  • Outer housings 411 and 421 generally include a distal end 413 and 423 , respectively, and two lateral side portions (e.g., first lateral side portion “S1” and second lateral side portion “S2” of the housing 411 shown in FIG. 4 ).
  • the outer housings 411 and 421 may be formed, at least in part, of an non-electrically-conductive or substantially non-electrically-conductive material.
  • Outer housing 411 and/or the outer housing 421 may include one or more electrically-conductive portions of suitable conductivity and so disposed in relation to one or more features of the dissector electrode 460 (e.g., tip portion 469 and/or shoulder portion 468 ) to provide a current return path.
  • the outer housing 411 includes two electrically-conductive portions 414 and 415 configured to provide a current return path.
  • the shape, size, and relative location of the electrically-conductive portions 414 and 415 e.g., in relation to the dissector electrode 460 , may be varied from the configuration depicted in FIG. 5 .
  • the tip portion 469 of the dissector electrode 460 may extend distally beyond the distal end 413 of the outer housing 411 .
  • Tip portion 469 may be configured to provide a desired function, and may include curves at various angles to facilitate contact with targeted tissue.
  • Tip portion 469 may include a sharp knife edge, a blunt tip, a blunt edge, paddle, hook, a ball-shaped portion, or another shape.
  • Shoulder portion 468 extends along at least a portion of the first lateral side portion “51” of the outer housing 411 .
  • Shoulder portion 468 may have any suitable dimensions, e.g., length, width and height. The shape and size of the shoulder portion 468 may be varied from the configuration depicted in FIG. 5 .
  • the tip portion 469 is configured for dissection, and the shoulder portion 468 is configured for coagulation.
  • Dissector electrode 460 may include any suitable electrically-conductive material, including, without limitation, metals, metal alloys, electrically-conductive polymers, and composite materials.
  • one or more portions of the dissector electrode 460 e.g., an inner-facing surface(s) thereof, may include an non-electrically-conductive or substantially non-electrically-conductive material configured to provide for electrical isolation between electrically-conductive elements of the dissector electrode 460 (e.g., tip portion 469 and/or shoulder portion 468 ) and one or more jaw assembly components, e.g., to reduce the chances of short circuiting the jaw assemblies 410 and 420 during activation, and/or to facilitate assembly and/or to meet specific tolerance requirements for proper jaw alignment, thermal resistance, strength and rigidity, which play a role in determining the reliability and effectiveness of electrosurgical instruments.
  • one or more portions of the dissector electrode 460 may include an non-electrically-conductive or substantially non-electrically-conductive material suitably configured to provide for electrical isolation between electrically-conductive elements of the dissector electrode 460 (e.g., tip portion 469 and/or shoulder portion 468 ) and one or more jaw assembly components, e.g., to facilitate assembly and/or to meet specific tolerance requirements for proper jaw alignment, thermal resistance, strength and rigidity.
  • an inner-facing surface(s) thereof may include an non-electrically-conductive or substantially non-electrically-conductive material suitably configured to provide for electrical isolation between electrically-conductive elements of the dissector electrode 460 (e.g., tip portion 469 and/or shoulder portion 468 ) and one or more jaw assembly components, e.g., to facilitate assembly and/or to meet specific tolerance requirements for proper jaw alignment, thermal resistance, strength and rigidity.
  • FIGS. 6 and 7 show an end-effector assembly 600 in accordance with an embodiment of the present disclosure that includes a dissector electrode 660 adapted for tissue dissection and coagulation.
  • End-effector assembly 600 generally includes two jaw assemblies 610 and 620 disposed in opposing relation relative to one another. Jaw assemblies 610 and 620 each include an tissue-engaging surface or sealing plate 612 and 622 , respectively, disposed in association with an outer housing 611 and 621 , respectively, and arranged in opposed relation relative to one another.
  • Dissector electrode 660 is generally insulated from the sealing plates 612 and 622 .
  • Dissector electrode 660 may be insulated, at least in part, from one or more electrically-conductive portions of the outer housing 611 and/or the outer housing 621 .
  • Outer housings 611 and 621 include distal ends 613 and 623 , respectively, and are configured to define two lateral side portions (e.g., first lateral side portion “51” and second lateral side portion “S3” extending distally from the distal end 613 of the housing 621 as shown in FIG. 6 ).
  • Outer housings 611 and 621 may be formed, at least in part, of an electrically-insulative material.
  • the outer housing 611 and/or the outer housing 621 include a configuration of one or more electrically-conductive portions suitably disposed relative to the dissector electrode 660 to provide a current return path. In some embodiments, as shown in FIG.
  • the outer housing 611 includes two electrically-conductive portions 614 and 615 configured to provide a current return path.
  • the shape, size, and relative location of the electrically-conductive portions 614 and 615 e.g., in relation to the dissector electrode 660 , may be varied from the configuration depicted in FIG. 7 .
  • Dissector electrode 660 may include any suitable electrically-conductive material, including, without limitation, metals, metal alloys, polymers, and composite materials. Dissector electrode 660 may be formed as a multi-layer configuration of materials. In some embodiments, one or more portions of the dissector electrode 660 , e.g., an inner-facing surface(s) thereof, may include an non-electrically-conductive or substantially non-electrically-conductive material suitably configured to provide for electrical isolation between electrically-conductive elements of the dissector electrode 660 (e.g., tip portion 669 and/or shoulder portion 668 ) and a configuration of one or more electrically-conductive portions of the jaw assemblies 610 and 620 , e.g., to facilitate assembly, and/or to ensure electrical isolation either in connection with, or independently from, the configuration of electrically-insulative bushings used to electrically isolate the opposing jaw assemblies 610 and 620 from one another.
  • an inner-facing surface(s) thereof may include an non-electrically-conductive or substantially
  • a dissector electrode, and/or components thereof, e.g., a shoulder portion may be disposed in association with the second lateral side portion “S4” of the outer housing 621 .
  • the end-effector assembly 600 may be configured with two dissector electrodes, e.g., disposed in association with each of the first and second lateral side portions “S3” and “S4”, respectively, e.g., to allow the user flexibility in the use of the end-effector assembly 600 to facilitate tissue dissection and coagulation.
  • FIG. 8 shows an end-effector assembly 800 in accordance with an embodiment of the present disclosure that includes a first dissector electrode 861 and a second dissector electrode 862 , e.g., adapted for tissue dissection and coagulation.
  • End-effector assembly 800 generally includes two jaw assemblies 810 and 820 disposed in opposing relation relative to one another. Jaw assemblies 810 and 820 each include an electrically-conductive tissue-engaging surface or sealing plate 812 and 822 , respectively, arranged in opposed relation relative to one another and disposed in association with an outer housing 811 and 821 , respectively. Jaw assemblies 810 and 820 shown in FIG. 8 are similar to the jaw assemblies 610 and 620 , respectively, shown in FIGS. 6 and 7 , and further description thereof is omitted in the interests of brevity.
  • First dissector electrode 861 is coupled along at least a portion of a lateral side portion “S5” of the outer housing 821 and the second dissector electrode 862 is coupled along at least a portion of a lateral side portion “S6” of the outer housing 821 , such that the first and second dissector electrode 861 and 862 , respectively, are disposed on the opposite sides of the jaw assembly 820 .
  • the first and second dissector electrodes 861 and 862 are similar to the dissector electrode 660 shown in FIGS. 6 and 7 and further description thereof is omitted in the interests of brevity.
  • FIG. 9 shows an end-effector assembly 900 in accordance with an embodiment of the present disclosure that includes a first dissector electrode 961 and a second dissector electrode 962 , e.g., adapted for tissue dissection and coagulation.
  • End-effector assembly 900 generally includes two jaw assemblies 910 and 920 disposed in opposing relation relative to one another. Jaw assemblies 910 and 920 each include an electrically-conductive tissue-engaging surface or sealing plate 912 and 922 , respectively, arranged in opposed relation relative to one another and disposed in association with an outer housing 911 and 921 , respectively.
  • Outer housing 921 includes a lateral side portion “S7” and a lateral side portion “S8”, and the outer housing 911 includes a lateral side portion “S9” and a lateral side portion “S10”.
  • the first dissector electrode 961 is coupled along at least a portion of the lateral side portion “S7” of the outer housing 921
  • the second dissector electrode 962 is coupled along at least a portion of the lateral side portion “S10” of the outer housing 811 , such that the first and second dissector electrode 961 and 962 , respectively, are disposed on the opposite sides of the jaw assemblies 920 and 910 , respectively.
  • the first and second dissector electrodes 961 and 962 are similar to the dissector electrode 660 shown in FIGS. 6 and 7 and further description thereof is omitted in the interests of brevity.
  • an end-effector assembly having a plurality of dissector electrodes may be adapted to allow the dissector electrodes to be individually activated, e.g., depending upon a particular purpose.
  • an electrically-insulative bushing may be used to electrically isolate the opposing jaw members from one another, wherein a configuration of one or more electrically-insulative bushings may be associated with either or both jaw assemblies.
  • a configuration of one or more electrically-insulative bushings may additionally, or alternatively, be associated with one or more dissector electrodes.
  • the electrically-insulative bushing may include ceramic or any of a variety of suitable non-electrically conductive materials such as polymeric materials, e.g., plastics, and/or other insulative materials.
  • other non-electrically conductive synthetic and/or natural materials having suitable weight, strength, cost and/or other characteristics may be used for the electrically-insulative bushing(s).
  • the above-described bipolar forceps embodiments that include a dissector electrode adapted for tissue dissection and coagulation are capable of directing energy into tissue, and may be suitable for use in a variety of procedures and operations.
  • the above-described end-effector embodiments may utilize both mechanical clamping action and electrical energy to effect hemostasis by heating tissue and blood vessels to coagulate, cauterize, cut and/or seal tissue.
  • the jaw assemblies may be either unilateral or bilateral.
  • the above-described bipolar forceps embodiments that include a dissector electrode adapted for tissue dissection and coagulation may be suitable for utilization with endoscopic surgical procedures and/or hand-assisted, endoscopic and laparoscopic surgical procedures.
  • the above-described bipolar forceps embodiments that include a dissector electrode adapted for tissue dissection and coagulation may be suitable for utilization in open surgical applications.
  • end-effector embodiments may be used in connection with sealing plates and support bases of jaw assemblies of varied geometries, e.g., lengths and curvatures, such that variously-configured jaw assemblies may be fabricated and assembled into various end-effector configurations that include a dissector electrode adapted for tissue dissection and coagulation, e.g., depending upon design of specialized electrosurgical instruments.

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US14/295,049 2013-09-24 2014-06-03 Electrode for use in a bipolar electrosurgical instrument Active 2035-02-24 US9717548B2 (en)

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US14/295,049 US9717548B2 (en) 2013-09-24 2014-06-03 Electrode for use in a bipolar electrosurgical instrument
EP18191608.1A EP3434216B1 (fr) 2013-09-24 2014-08-22 Électrode destinée à être utilisée dans un instrument électrochirurgical bipolaire
PCT/US2014/052212 WO2015047611A1 (fr) 2013-09-24 2014-08-22 Électrode utilisée dans un instrument électrochirurgical bipolaire
CN201480052501.2A CN105578980B (zh) 2013-09-24 2014-08-22 在双极型电外科仪器中使用的电极
EP14848376.1A EP3049006B1 (fr) 2013-09-24 2014-08-22 Électrode utilisée dans un instrument électrochirurgical bipolaire

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US14/295,049 US9717548B2 (en) 2013-09-24 2014-06-03 Electrode for use in a bipolar electrosurgical instrument

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US20150088128A1 (en) 2015-03-26
EP3434216B1 (fr) 2024-09-25
EP3049006A4 (fr) 2017-07-05
CN105578980B (zh) 2018-12-11
EP3049006A1 (fr) 2016-08-03
CN105578980A (zh) 2016-05-11
EP3049006B1 (fr) 2018-10-10

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